Brian Tracy Books
4 books by Brian Tracy spanning self-help, with a short summary of each and where to buy it.
Si lo crees, lo creas: Elimina tus dudas, cambia tus creencias y suelta el pasado para alcanzar todo tu potencial / Believe It to Achieve It
The Psychology of Selling How to Sell More, Easier, and Faster Than You Ever Thought Possible
No Excuses! The Power of Self-Discipline
Psicologia de Ventas